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3 years ago

Which phrase describes a homogeneous catalyst?

Chemistry

2 answers:

SashulF [63]3 years ago

5 0

Answer: Option (A) is the correct answer.

Explanation:

When both reactants and catalyst are present in the same phase then it is known as a homogeneous catalyst.

Catalysts help in increasing the rate of a chemical reaction without itself getting consumed as catalysts lowers the activation energy path. Therefore, molecules with less energy can also effectively take part in the reaction.

Catalysts also help in carrying out various biological reactions.

Thus, we can conclude that the phrase present in many biological reactions describes a homogeneous catalyst.

soldier1979 [14.2K]3 years ago

3 0

The phrase that best describes a homogeneous catalyst is : A. Present in many biological reactions
since in a homogeneous catalyst the catalyst is in the same phase as the reactant, it applies in both gas and solid phase

hope this helps

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You have at your disposal 3 1-pound bags of various pure salts that dissolve readily in water. You can add one of the bags to a

Sedaia [141]

Answer:

This question appears incomplete

Explanation:

However, it should be noted that addition of soluble salts generally lowers the freezing point of water hence after the addition, water will no longer freeze at 0°C but lower.

Soluble salts tend to form more ions in water, it is these ions that are responsible for interfering with the hydrogen bonds hence lowering the freezing. Thus, (since each bag are of the same weight) the bag that contains the salt that ionizes more in water will lower the freezing point by the greatest amount.

NOTE: Different weight of the salts could lead to more ions been formed in the water by some salts as against the other.

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4 years ago

The decomposition of NI3 to form N2 and I2 releases −290.0 kJ of energy. The reaction can be represented as 2NI3(s)→N2(g)+3I2(g)

EastWind [94]

Answer:

-7.34 kilo Joules is the change in enthaply when 20.0 grams of nitrogen triiodide decomposes.

Explanation:

Mass of nitrogen triiodide = 20.0 g

Moles of nitrogen triiodide = $\frac{20.0 g}{395 g/mol}=0.05063 mol$

$2NI_3(s)\rightarrow N_2(g)+3I_2(g), \Delta H_{rxn}=-290.0 kJ$

According to reaction, 2 moles of nitrogen triiodide gives 290.0 kilo Joules of heat on decomposition ,then 0.05063 moles of nitrogen triiodide will give :

$\frac{-290.0 kJ}{2}\times 0.05063=-7.34 kJ$

-7.34 kilo Joules is the change in enthaply when 20.0 grams of nitrogen triiodide decomposes.

3 0

3 years ago

My teacher is grading this soon can someone help me ASAP!

Stolb23 [73]

10. You demonstrated the difference in density of the two objects. It is a physical property.

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3 years ago

Which of the following IS a valid piece scientific evidence?

Vanyuwa [196]

im sorry it doesn't show

5 0

3 years ago

5.0 x 10^24 molecules equal

Ratling [72]

4.999999999999999e+24 this is what i got on the calculator but i dont know if its right.

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3 years ago